SMS Viribus Unitis was a pioneering Austro-Hungarian dreadnought battleship and the lead vessel of the Tegetthoff class. Constructed at the Stabilimento Tecnico Triestino shipyard in Trieste, she was laid down on 24 July 1910, launched on 24 June 1911, and commissioned into the navy on 5 December 1912. She measured approximately 152 meters in overall length, with a beam of 27.9 meters and a deep load draught of 8.7 meters. Displacing around 20,000 tonnes at load, her design facilitated formidable firepower and armor. Her propulsion system comprised four Parsons steam turbines powered by twelve Babcock & Wilcox boilers, collectively producing 27,000 shaft horsepower, which aimed to reach a top speed of 20 knots. She was armed with twelve 30.5 cm Škoda guns in four triple turrets, complemented by a secondary battery of twelve 15 cm guns in casemates and twelve 7 cm anti-aircraft guns, along with four submerged 21-inch torpedo tubes. Her operational range was approximately 4,200 nautical miles at 10 knots, fueled by coal and oil. Viribus Unitis’s early career included training missions and diplomatic port visits, notably transporting Archduke Franz Ferdinand in June 1914 to Bosnia, where he was assassinated, igniting World War I. During the war, her activity was limited by the Otranto Barrage but included participation in the German fleet’s sortie supporting the flight of SMS Goeben and Breslau, and the bombardment of Ancona in 1915. She generally remained at Pola, serving as a symbol of Austro-Hungarian naval power. Her wartime service concluded with her involvement in the 1918 sortie attempting to break the Otranto Barrage, which resulted in the sinking of her sister ship Szent István. Following Austria-Hungary’s defeat, Viribus Unitis was transferred to the newly formed State of Slovenes, Croats and Serbs and renamed Jugoslavija. She was ultimately sunk at anchor on 1 November 1918 by Italian motor torpedo boats, in an act of wartime sabotage. Today, she remains a significant symbol of the Austro-Hungarian Navy, commemorated on a high-value coin and preserved in models and artifacts.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.